(defvar *default-empire-server* "localhost")
(defvar *default-empire-server-port* 6665)
+(defvar *last-active-connection* nil)
+
(defclass connection ()
((user
:initarg :user
:initarg :stream
:accessor network-stream
:documentation "Stream used to talk to the empire server.")
- (logging-stream
- :initarg :logging-stream
- :accessor logging-stream
- :initform t
- :documentation "Messages coming back from the server is sent to
-this stream.")
(connection-handler
:accessor connection-handler
:initform nil
- :documentation "Handler function for incoming messages")))
+ :documentation "Handler function for incoming messages")
+ (mode
+ :accessor connection-mode
+ :initform nil
+ :documentation "TODO(gefla)")
+ (session
+ :accessor session
+ :initarg :session
+ :documentation "web session to which this connection belongs")
+ (send-queue
+ :accessor send-queue
+ :initform (locked-queue:create)
+ :documentation "lines outstanding to be sent at next prompt")
+ (xdump :accessor xdump :initform (xdump:make-parser))))
(defun make-connection (&key (user nil)
(password nil)
(server-port *default-empire-server-port*)
(socket nil)
(network-stream nil)
- (logging-stream nil))
+ session)
(make-instance 'connection
:user user
:password password
:server-port server-port
:socket socket
:stream network-stream
- :logging-stream logging-stream))
+ :session session))
;;; interface
(defun connect (&key (user nil)
(password nil)
(server-name *default-empire-server*)
(server-port *default-empire-server-port*)
- (logging-stream *standard-output*))
+ session)
"Connect to server and return a connection object."
(let* ((socket (usocket:socket-connect server-name server-port))
(stream (usocket:socket-stream socket))
:password password
:socket socket
:network-stream stream
- :logging-stream logging-stream
:server-name server-name
- :server-port server-port))
+ :server-port server-port
+ :session session))
(handler (spawn-with-name (format nil "empire-handler-~a" user)
#'handle-connection connection)))
(setf (connection-handler connection) handler)
+ (empire-log:info "~a: connect" connection)
connection))
-
(defgeneric quit (connection))
(defgeneric handle-connection (connection))
(defgeneric read-message (connection))
-(defgeneric send-message (connection message))
+(defgeneric send-message (connection message &key next-mode))
+(defgeneric connected-p (connection))
+(defgeneric reconnect (conncetion))
+
+(defmethod connected-p ((c connection))
+ (sb-thread:thread-alive-p (connection-handler c)))
+
+(defmethod reconnect ((c connection))
+ (with-slots (server-name server-port user password socket stream connection-handler) c
+ (let* ((sock (usocket:socket-connect server-name server-port))
+ (s (usocket:socket-stream sock)))
+ (setf socket sock
+ stream s
+ connection-handler (spawn-with-name (format nil "empire-handler-~a" user)
+ #'handle-connection c))))
+ (empire-log:info "~a: reconnect" c))
(defparameter +C_CMDOK+ "0")
(defparameter +C_DATA+ "1")
(defparameter +C_EXIT+ "3")
(defparameter +C_FLUSH+ "4")
(defparameter +C_NOECHO+ "5")
-(defparameter +C_PROMPT+ "6")
+(defparameter +C_PROMPT+ "6")
(defparameter +C_ABORT+ "7")
(defparameter +C_REDIR+ "8")
(defparameter +C_PIPE+ "9")
(defparameter +C_FLASH+ "d")
(defparameter +C_INFORM+ "e")
-(defgeneric init-mode (connection message))
-(defmethod init-mode ((c connection) message)
+(defclass base-mode ()
+ ((connection :initarg :connection :accessor connection)))
+(defclass init-mode (base-mode)
+ ((phase :initform :initial
+ :documentation "Initialization phase")))
+(defclass play-mode (base-mode) nil)
+
+(defun make-mode (connection mode)
+ (make-instance mode :connection connection))
+
+(defgeneric set-new-mode (base-mode new-mode))
+(defmethod set-new-mode ((m base-mode) new-mode)
+ (let* ((c (connection m))
+ (mode (make-mode c new-mode)))
+ (empire-log:info "~a: set-new-mode ~a -> ~a" c (connection-mode c) new-mode)
+ (setf (connection-mode c) mode)))
+
+(defgeneric handle-cmdok (base-mode message))
+(defgeneric handle-data (base-mode message))
+(defgeneric handle-init (base-mode message))
+(defgeneric handle-exit (base-mode message))
+(defgeneric handle-prompt (base-mode message))
+(defgeneric handle-flush (base-mode message))
+(defgeneric handle-simple-message (base-mode message))
+(defgeneric handle-ignore (base-mode message))
+
+(defmethod handle-init ((m init-mode) message)
+ (declare (ignorable message))
+ (with-slots (phase connection) m
+ (ecase phase
+ (:initial (handle-cmdok m message))
+ (:play-sent (set-new-mode m 'play-mode)))))
+
+(defmethod handle-cmdok ((m init-mode) message)
+ (declare (ignorable message))
+ (with-slots (phase connection) m
+ (flet ((init-phase (mode send-args next-phase)
+ (with-slots (phase connection) mode
+ (send-message-one connection (apply #'format nil send-args))
+ (setf phase next-phase))))
+ (with-slots (user password) (connection m)
+ (ecase phase
+ (:initial (init-phase m `("client eow ~a" ,*version*) :client-sent))
+ (:client-sent (init-phase m `("coun ~a" ,user) :coun-sent))
+ (:coun-sent (init-phase m `("pass ~a" ,password) :pass-sent))
+ (:pass-sent (init-phase m '("play") :play-sent)))))))
+
+(defmethod handle-exit ((m init-mode) message)
+ (declare (ignorable message))
+ (with-slots (phase connection) m
+ (ecase phase
+ (:play-sent (send-message-one connection "kill")
+ (setf phase :kill-sent))
+ (:kill-sent (send-message-one connection "play")
+ (setf phase :play-sent)))))
+
+(defmethod handle-data ((m init-mode) message)
+ (declare (ignorable message))
+ t)
+
+(defmethod handle-exit ((m play-mode) message)
+ (declare (ignorable message))
+ (quit (connection m)))
+
+(defmethod handle-data ((m play-mode) message)
+ (let* ((c (connection m)))
+ (empire-web:data (session c) message)))
+
+(defmethod handle-simple-message ((m play-mode) message)
+ (let* ((c (connection m)))
+ (empire-web:data (session c) message)))
+
+(defmethod handle-flush ((m play-mode) message)
+ (let* ((c (connection m)))
+ (empire-web:prompt (session c) message)
+ (send-next-line c)))
+
+(defmethod send-next-line ((c connection))
+ (let ((next-event (locked-queue:dequeue (send-queue c))))
+ (etypecase next-event
+ (string (send-message-one c next-event))
+ (cons (let ((message (car next-event))
+ (mode (cdr next-event)))
+ (send-message-one c message)
+ (set-new-mode (connection-mode c) mode))))))
+
+(defun read-no-eval (stream)
+ (let ((*read-eval* nil))
+ (read stream)))
+
+(defmethod handle-prompt ((m play-mode) message)
+ (let* ((c (connection m)))
+ (with-input-from-string (s message)
+ (let* ((minutes (read-no-eval s))
+ (btus (read-no-eval s)))
+ (empire-web:prompt (session c)
+ (format nil "[~a,~a]: " minutes btus))))
+ (send-next-line c)))
+
+(defmethod handle-ignore ((m init-mode) message)
(declare (ignorable message))
- (play c))
+ t)
-(defvar *line-type-dispatch*
- (list `(,+C_INIT+ . init-mode)))
+(defparameter *line-type-dispatch*
+ (list `(,+C_DATA+ . handle-data)
+ `(,+C_INIT+ . handle-init)
+ `(,+C_EXIT+ . handle-exit)
+ `(,+C_FLUSH+ . handle-flush)
+ `(,+C_BADCMD+ . handle-simple-message)
+ `(,+C_FLASH+ . handle-simple-message)
+ `(,+C_CMDOK+ . handle-cmdok)
+ `(,+C_PROMPT+ . handle-prompt)))
(defun parse-server-line (line)
(let* ((first-space-index
if (eq (char line i) #\Space)
do (return i)))
(message-type (subseq line 0 first-space-index))
- (message (subseq line (+ first-space-index 1))))
+ (message (if first-space-index
+ (subseq line (+ first-space-index 1))
+ "")))
(values message message-type)))
(defmethod handle-connection ((c connection))
+ (setf (connection-mode c) (make-mode c 'init-mode))
(loop while (read-message c)))
(defun lookup-handler (message-type)
(cdr (assoc message-type *line-type-dispatch* :test 'string=)))
+(define-condition no-handler (error)
+ ((mode :initarg :mode)
+ (type :initarg :type))
+ (:report (lambda (condition stream)
+ (with-slots (mode type) condition
+ (format stream "No handler for ~a in mode ~a."
+ type mode)))))
(defmethod read-message ((c connection))
- (let* ((s (network-stream c))
- (log (logging-stream c))
- (line (read-line s)))
- (format log "< ~a~%" line)
- (multiple-value-bind (message type) (parse-server-line line)
- (let ((handler (lookup-handler type)))
- (funcall handler c message)))
- line))
-
-(defmethod send-message ((c connection) message)
- (let ((s (network-stream c))
- (log (logging-stream c)))
- (format log "< ~a~%" message)
+ (handler-case
+ (let* ((s (network-stream c))
+ (line (read-line s)))
+ (empire-log:info "~a: < ~a" c line)
+ (setf *last-active-connection* c)
+ (multiple-value-bind (message type) (parse-server-line line)
+ (let ((handler (lookup-handler type))
+ (mode (connection-mode c)))
+ (if handler
+ (funcall handler mode message)
+ (error 'no-handler :mode mode :type type))))
+ line)
+ (sb-int:closed-stream-error () nil)
+ (sb-int:simple-stream-error () nil)
+ (end-of-file () nil)))
+
+(defun raw-send-message (s message)
(write-sequence message s)
(terpri s)
- (force-output s)
- message))
+ (force-output s))
-(defgeneric play (connection))
-(defmethod play ((c connection))
- (with-slots (user password) c
- (send-message c (format nil "play FIXME ~a ~a" user password))))
+(defgeneric send-message-one (connection string))
+(defmethod send-message-one ((c connection) message)
+ (empire-log:info "~a: > ~a" c message)
+ (setf *last-active-connection* c)
+ (let ((s (network-stream c)))
+ (raw-send-message s message)))
-(defmethod quit ((c connection))
- (usocket:socket-close (socket c)))
+(defmethod send-message ((c connection) message &key next-mode)
+ (if (not (connected-p c))
+ (reconnect c))
+ (if next-mode
+ (locked-queue:enqueue (send-queue c) (cons message next-mode))
+ (locked-queue:enqueue (send-queue c) message)))
+
+(defparameter +special-command-char+ #\;)
+
+(defun special-command-p (line)
+ (and (> (length line) 0)
+ (char= +special-command-char+ (aref line 0))))
+
+(defclass xdump-mode (play-mode)
+ ((phase :initform :meta-meta)
+ (dump-queue :initform nil)
+ (dump-index :initform 0)))
+
+(defmethod handle-data ((m xdump-mode) message)
+ (with-slots (connection phase dump-queue dump-index) m
+ (xdump:with-parser (xdump connection)
+ (if (xdump:parse-line (xdump connection) message)
+ ;;XXX consider something like a 'pop-mode function
+ (ccase phase
+ (:meta-meta
+ (setf phase :meta-table)
+ (send-message connection "xdump meta table"))
+ (:meta-table
+ (setf phase :table-table)
+ (send-message connection "xdump table *"))
+ (:table-table
+ (setf phase :meta-type)
+ (send-message connection "xdump meta meta-type"))
+ (:meta-type
+ (setf phase :type-table)
+ (send-message connection "xdump meta-type *"))
+ (:type-table
+ (setf phase :tables-meta
+ dump-queue (xdump::table-entries (xdump:table "table"))
+ dump-index 0)
+ (send-message connection (format nil "xdump meta ~a" (xdump-data:name (aref dump-queue 0)))))
+ (:tables-meta
+ (setf phase :tables-content)
+ (send-message connection (format nil "xdump ~a *" (xdump-data:name (aref dump-queue dump-index)))))
+ (:tables-content
+ (if (< dump-index (fill-pointer dump-queue))
+ (progn (setf phase :tables-meta)
+ (incf dump-index)
+ (loop while (and (< dump-index (fill-pointer dump-queue))
+ (let ((dump-queue-entry (aref dump-queue dump-index)))
+ (or (null dump-queue-entry)
+ (string= "meta"
+ (xdump-data:name dump-queue-entry)))))
+ do (incf dump-index))
+ (if (and (<= dump-index (fill-pointer dump-queue))
+ (not (null (aref dump-queue dump-index))))
+ (send-message connection (format nil "xdump meta ~a" (xdump-data:name (aref dump-queue dump-index))))))
+ (progn
+ (xdump:checkpoint)
+ (set-new-mode (connection-mode connection) 'play-mode)))))))))
+(defmethod special-xup ((c connection))
+ (let ((user-log (empire-log:open-user-log (user c))))
+ (setf (xdump c) (xdump:make-parser :user-log user-log))
+ (send-message c "xdump meta meta" :next-mode 'xdump-mode)))
-;;; Tests
-(defvar *l1* "2 Empire server ready")
-;; (parse-server-line *l1*)
+(defmethod special-command ((c connection) line)
+ (cond ((string= line "xup") (special-xup c))
+ (t (empire-web:data (session c) "Unknown special command")))
+ line)
+
+(defmethod command ((c connection) line)
+ (cond ((special-command-p line) (special-command c (subseq line 1)))
+ (t (send-message c line))))
+
+(defmethod quit ((c connection))
+ (usocket:socket-close (socket c)))